Make updateSSLStats more generic.
Make updateSSLStats more generic.

Summary: This allows it to act as a more generic "secure handshake stats" function.

Reviewed By: siyengar

Differential Revision: D2708817

fb-gh-sync-id: 1347d1ffdcf29495859cd782d9025dbe56facc7a

Dalzhim/wangle,facebook/wangle,jamperry/wangle,Dalzhim/wangle,jamperry/wangle,facebook/wangle,facebook/wangle